diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 06c3310446a261e03bfee134e3c524d005c5b784..987cf509337f232546777f0847f8e73950e44a8c 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -1623,6 +1623,13 @@ static const u8 icp_ddc_pin_map[] = {
 	[TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
 };
 
+static const u8 rkl_pch_tgp_ddc_pin_map[] = {
+	[ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
+	[ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
+	[RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
+	[RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
+};
+
 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 {
 	const u8 *ddc_pin_map;
@@ -1630,6 +1637,9 @@ static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 
 	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) {
 		return vbt_pin;
+	} else if (IS_ROCKETLAKE(dev_priv) && INTEL_PCH_TYPE(dev_priv) == PCH_TGP) {
+		ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
+		n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
 	} else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) {
 		ddc_pin_map = icp_ddc_pin_map;
 		n_entries = ARRAY_SIZE(icp_ddc_pin_map);
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 49b4b5fca94111bb0877573a359433c9afc8887a..187ec573de59d1e37c723c74e6bb547317bb871d 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -319,6 +319,8 @@ enum vbt_gmbus_ddi {
 	ICL_DDC_BUS_DDI_A = 0x1,
 	ICL_DDC_BUS_DDI_B,
 	TGL_DDC_BUS_DDI_C,
+	RKL_DDC_BUS_DDI_D = 0x3,
+	RKL_DDC_BUS_DDI_E,
 	ICL_DDC_BUS_PORT_1 = 0x4,
 	ICL_DDC_BUS_PORT_2,
 	ICL_DDC_BUS_PORT_3,